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UC3876 相移谐振控制器

	UC3876
Topology	Full-Bridge
Control Method	Current Mode, Voltage Mode
Duty Cycle(Max)(%)	100
Frequency(Max)(kHz)	1000
UVLO Thresholds On/Off(V)	15.2/9.2
Pin/Package	20PDIP
Regulated Outputs(#)	4
Operating Temperature Range(°C)	0 to 70
Rating	Catalog

UC3876 描述

The UC1875 family of integrated circuits implements control of a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other, allowing constant frequency pulse-width modulation in combination with resonant, zero-voltage switching for high efficiency performance at high frequencies. This family of circuits may be configured to provide control in either voltage or current mode operation, with a separate over-current shutdown for fast fault protection.

A programmable time delay is provided to insert a dead-time at the turn-on of each output stage. This delay, providing time to allow the resonant switching action, is independently controllable for each output pair (A-B, C-D).

With the oscillator capable of operation at frequencies in excess of 2MHz, overall switching frequencies to 1MHz are practical.

UC3876 特性

• Zero to 100% Duty Cycle Control
• Programmable Output Turn-On Delay
• Compatible with Voltage or Current Mode Topologies
• Practical Operation at Switching Frequencies to 1MHz
• Four 2A Totem Pole Outputs
• 10MHz Error Amplifier
• Undervoltage Lockout
• Low Startup Current—150µA
• Outputs Active Low During UVLO
• Soft-Start Control
• Latched Over-Current Comparator With Full Cycle Restart
• Trimmed Reference

UC3876 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
UC3876DW	ACTIVE	0 to 70	1.90 | 1ku	SOIC (DW) | 16	40 | TUBE	UC3876DW
UC3876DWG4	ACTIVE	0 to 70	1.90 | 1ku	SOIC (DW) | 16	40 | TUBE	UC3876DW
UC3876N	ACTIVE	0 to 70	1.90 | 1ku	PDIP (N) | 16	25 | TUBE	UC3876N
UC3876NG4	ACTIVE	0 to 70	1.90 | 1ku	PDIP (N) | 16	25 | TUBE	UC3876N

UC3876 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
UC3876DW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC3876DW
UC3876DWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC3876DWG4	UC3876DWG4
UC3876N	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type		UC3876N
UC3876NG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	UC3876NG4	UC3876NG4

UC3876 应用技术支持与电子电路设计开发资源下载

1. UC3876 数据资料 dataSheet 下载.PDF
2. TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
3. Dual MOSFET Driver (PDF  498 KB)
4. 标准线性产品交叉参考 (Rev. D)   (PDF  1058 KB)
5. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
6. 所选封装材料的热学和电学性质 (PDF 645 KB)
7. 高速数据转换 (PDF 1967 KB)
8. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
9. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
10. Principles of Data Acquisition and Conversion (PDF 50 KB)
11. Interleaving Analog-to-Digital Converters (PDF 64 KB)
12. What Designers Should Know About Data Converter Drift (PDF 95 KB)
13. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
14. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

UC3876 工具与软件

名称	型号	公司	工具/软件类型
音频的快速搜索选择工具	AUDIO_SELECTION_TOOL	Texas Instruments	免费评估工具
UC3876 评估模块	UC3876EVM	Texas Instruments	开发电路板/EVM
用于音频转换器的软件驱动程序	CODECDRIVERS-SW	Texas Instruments	应用软件